unshar - unpack a shar file
unshar [ options ] [ file ... ]
Unshar scans mail messages looking for the start of a shell archive.
It then passes the archive through a copy of the shell to unpack it.
It will accept multiple files. If no files are given, standard input
Options have a one letter version starting with - or a long version
starting with --. The exception is --help and --version, which does
not have a short version.
Print the version number of the program on standard output, then
--help Print a help summary on standard output, then immediately exits.
-d DIRECTORY --directory=DIRECTORY
Change directory to DIRECTORY before unpacking any files.
Passed as an option to the shar file. Many shell archive
scripts (including those produced by ‘shar’ 3.40 and newer)
accepts a -c argument to indicate that existing files should be
This option exists mainly for people who collect many shell
archives into a single mail folder. With this option, ‘unshar’
isolates each different shell archive from the others which have
been put in the same file, unpacking each in turn, from the
beginning of the file towards its end. Its proper operation
relies on the fact that many shar files are terminated by a
‘exit 0’ at the beginning of a line.
Option -e is internally equivalent to -E "exit 0".
-E STRING --split-at=STRING
This option works like -e, but it allows you to specify the
string that separates archives if ‘exit 0’ isn’t appropriate.
For example, noticing that most ‘.signatures’ have a ‘--’ on a
line right before them, one can sometimes use ‘--split-at=--’
for splitting shell archives which lack the ‘exit 0’ line at
end. The signature will then be skipped altogether with the
headers of the following message.
The same as -c.
Any message from the shell may be displayed.
The shar and unshar programs is the collective work of many authors.
Many people contributed by reporting problems, suggesting various
improvements or submitting actual code. A list of these people is in
the THANKS file in the sharutils distribution.
September 10, 1995 UNSHAR(1)
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